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目的:建立工作场所空气中异亚丙基丙酮的采样和测定方法。方法:工作场所空气用活性炭管采集,经1%甲醇的二硫化碳溶液解吸,FFAP毛细色谱柱分离,氢火焰离子化检测器(FID)检测,按照《工作场所空气中有毒物质检测方法研制规范》的要求进行方法研究。结果:异亚丙基丙酮浓度在10~1000μg/ml内呈良好线性关系,相关系数0.9999,最低检出浓度为0.2 mg/m3,相对标准偏差<5%(n=6);气体采样效率≥96.6%,100 mg活性炭对异亚丙基丙酮的穿透容量为4.7 mg,平均解吸效率97.6%;活性炭样品室温下可保存7天;丙酮、丁酮、异佛尔酮、苯、甲苯、二甲苯等共存物不干扰测定。结论:本方法各项指标达到《工作场所空气中有毒物质检测方法研制规范》要求,适用于工作场所空气中异亚丙基丙酮的测定。
Objective: To establish a method for sampling and measuring mesitylpropiophenone in the air of workplace. Methods: The air in the workplace was collected by activated charcoal tube, desorbed by 1% methanol disulfide solution, separated by FFAP capillary column and detected by flame ionization detector (FID). According to the “Norms of Detection of Toxic Substances in the Workplace Requires methodological studies. Results: The calibration curve was linear in the range of 10-1000 μg / ml with a correlation coefficient of 0.9999. The lowest detection limit was 0.2 mg / m3 with a relative standard deviation of less than 5% (n = 6). Gas sampling efficiency was ≥ 96.6% and 100 mg of activated charcoal had a breakthrough capacity of 4.7 mg and an average desorption efficiency of 97.6%. Activated charcoal samples could be stored at room temperature for 7 days. Acetone, butanone, isophorone, benzene, toluene and bis Toluene and other co-deposits do not interfere with the determination. Conclusion: The indexes of this method meet the requirements of the ”Norms for the Development of Test Methods for Toxic Substances in the Air at Work" and are suitable for the determination of mesityl oxide in the air of the workplace.